Sewing machine



Oct. 27, 1931. H. WEISNER SEWING MACHINE Filed Sept. 5. 1929 3Sheets-Sheet l Mentor:

H. WEISNER SEWING MACHINE Filed Sept. 5. -1929 3 Sheets-Sheet 2 Oct. 27,1931.- v H. WEISNER 1,823,386

sfiwme m cama Filed Sept. 1929 3 Sheets-Sheet 3 Patented ct..27, 1931 jmay wmsm n, or PHILA ELPHIA. PENNSYLVANIA ing machine of the abovementioned type, of

PAT-E oFFi cn SEWING. mourns lnplication filed' septeinber' 3, 1929.serial No. 389,916

Q Myv invention relatesto' sewingg machin'es, anditrelates'moreparticularly'to improved means for feeding the material insewing machines of the overseaming type, 'such 'as are commonly 'usedfor uniting the edges of fur, and knitted and'textile goods', by meansofa chain stitch in whichthe loops are carried over the edges of thegoods. "I 1 The principalobject-of my presentinvention is to provideimproved means forfeed ing the material ina sewing machine of-the abovementioned type, whereby relative movement or gathering of one portion ofthe material with respect to the other is .minimized. i @Withtheforegoingobject in View, my invention contemplates the provision, ina sewmeans for positively actuating the outer feed disk in synchronism'with the inner feed disk, 8 instead of-permitting the I outer feed disk.to

be frictionally driven through the material, as hasheretofore been done.A

By the use of a machine embodying'the present invention, a better ualityof work will be insured, andthe machlne may be used by a relativelyinexperienced operator with satisfactory results.

The nature and characteristic featureslof my invention will be morereadily under- View of a' well, known type of-:overseamingsewingmachine, having incorporated there in mechanism, embodying themain features of my present-invention, the cover plate of the machinebeing removed 1.

Fig. 2 is, atop of plan'view thereof; and

r Fig. 3 is an underneathplan view thereof.

.11 will, ofcourse, be .cunderstoodthat the drawings; and descriptionherein contained are illustrative merely,.and that variousmodifieationsi and changes may be made in the structure withoutfdeparting fromthe spirit of my invention. 7 r I 7 Referring to thedrawings,;5 is the main frame of a sewing machine tov which theapparatus of the present invention is applied.

the sewing operation;

This sewin machine is of a well known type, many of said machines being{in common use.

Upon the main shaft 6 of thesewing machine an eccentric? is mounted. Theeccentric 7 serves to reciprocate a needle bar 8, 5 which is slidablymounted in the frame 5 of the machine. The. front end of'the needle bar8 carries a needle holder 9.

Arranged below theneedle holder .9 is the inner feed disk 10, whichissecured to the upper end of a vertical shaft'llJ The shaft 11 isjournaled in the frame of the machine. A gear 12 is mounted upon theshaft 11, this ear being engaged'by a spiral crown gear 13. he crowngear 13 is mounted upon a horizontalshaft 14, to which intermittentrotary motionis imparted by mechanism not shown, but commonly usedinmachines of this ty e and {well known to those familiar therewit Theouter feed disk 15 is journaled on a stud shaft 16, which is secured ina clamp portion 17 of a bracket arm 18. The bracket arm 18 is carried atthe front ends of rods 19 and 20, which areslidably mounted in theframework ofthe machine.

The bracket arm 18, and the parts carried a bell "crank lever21 one arm22 of which engages a recessed portion 23 of the slide rod 20. The otherarm 24 of the bell crank lever 21 is engaged by a pull rod 25, whichextends to a pedal .(not shown) ,forarbitrarily moving forwardly thebracket arm 18 and the parts .carriedthereby. v

Thebell. crankllever21 is mounted upon a transversefshaft .26, uponwhich is "also mounted a torsional coil spring 27,0ne end of whichengages the bell crank lever 21, and the other end ofi'whic'h engages astationary partof the machine. v v i Bylthe foregoin mechanism, thebracket arm 18 will normal ybe held inthe retracted position, thuscausing the outer feed disk 15' tobe pressedtoward'theinner feed disk10, to grip the materialtherebetween during There isalsoprovided inthesemachines a looperbar 28, having a chuck 29 at its forward end, in whichthe looper is carried. 5 The looper bar 28 is actuated with a combinedreciprocatory, rotary, and angular movement, by mechanism which is notshown, as it constitutes no essential part of the present invention, andis well known to those familiar with machines of this type.

The foregoing is a brief description of a well known type of sewingmachine, to which the apparatus of the present invention is particularly applicable although it will, of course, be understood that theinvention is equally applicable to, other. similar types, of;

sewing machines, in which the material is fed between two disks with astepby step.

vertical shaft 33-isj ournaled in a bracket 34, i

which is secured; to the bracket arm l 8, hereinbefore described; Thevertical shaft 33 is positioned forwardly and to oneside of. the axisoftheouter feed disk 15, so that thesame does not inter. fere wit'h aclear view of the stitching opera: tion while the machine is beingactuated;

The upper end of the shaft 33' carries a bevel gear 35', which mesheswithfand is driven by a bevel gear 36 mounted on. the front endofahorizontal shaft 37, which extends over the top of the bracket armlS.The inner end of the shaft 37is provided with a sleeve 38, in which ashaft 39 telescopes, A

pin 40 extends transversely through the; sliaft 39, and has its outerends engaged by slots 41 in the sleeve portion 38 0f the shaft 37';

By the foregoing arrangement, the shaft 37 will be constrained to rotateinunison with the shaft 39, while at the same time relative longitudinalmovement between these two shafts will be permitted when the feed disks10 and 15 are separated by thematerialfpass ing therebetween.

The shaft 39 is journaled in a I suitable bracket 42, which is securedtothe frame 5 of the machine. The inner end of the shaft 39 carries abevel gear 43, which meshes with and is'dr'iven by a bevel gear441' vThe bevel gear l t is mounted on the upper end of a vertical shaft 45.The upper portion of'the shaft 45 isjournaled 'inthejbracket 42, and thelower portion thereof is journaled in a bracket 46 secured to theinterior ofthe frame 5. V The lower end'of'the shaft 45 carries a bevelgear 47, which meshes with and is drivon bya-bevel gear 48. The bevelgear 48 ismount edupon a horizontal shaft 459, which carries at itsotherQend a bevel gear 50.

The bevel gear 50 meshes with and is driven by a bevel gear 51, which ismounted upon a horizontal, forwardly extending shaft 52. The shaft 52 isjournaled in suitable blocks 53 and 54, which are secured to the frame 5of the machine.

The front end of the shaft 52 carries a bevel; gear 55, which mesheswith and is driven by a bevel gear 56. The bevel gear 56 is mounted uponthe transverse shaft 14, hereinbefore descnibed whichconstitutes part ofthe mechanism for actuating the inner feed disk. 10;

The operation of the device may now be explained; As-herei'nbeforepointed out, the shaft, 1ft has a step by step motion imparted thereto,in synchronism with the reciprocation of thefneedle andthe actuation ofthe looper, andas said shaft is so actuated, motion is imparted to theverticalshaft, 11 by means of the spiral crown gear. 13 andgear 12; Inthis manner, the inner feed disk, 10', which,is mounted upon the upperendgofthe shaft 11, is actuated.

As the shaft 1a is actuated, the motion of the same is also transmittedthrough gear 56, which is mountedthereomto gear 55, which is mounted onshaft 52: The motion is then transmitted; byshaft 52, through gear 51,to gear 50, which is mounted on shaft 49. The motion of shaft 49 istransmitted through gear-.48 to gear 47', which ismounted on thevertical shaft 45* eXtendingupwardly at the rearcorner of-the machine.

The motion; of shaft. 45 istransmitted through gear togear 43 whichismounted on the A end of shaft 39. The motion of{ sh aft 39 istransmitted, through the pinand slot connection with the sleeve 38; tosha ft' The" motionofshaft 37 istransmitted through goar36togear 35,which is mounted on shaft33. The moti'onof shaft 33 is trans: mitted bypinion 32; through idler gear- 31, to gear 30, which is secured tothelower portion of the outer feed'di'sk 1=5=.

The gear ratiosin the above mechanism are suehthatthe outer; feed diskisconstrained positively to: rotate in unison withthe inner feed disk- 10:v

The outer feed disk 15", beingcarried by the bracket: arm 18 will" be:impelled toward the inner feeds disk; 10; This: action; is accomplishediby means of" the arm 22 of l bell orank1ever 21, which is under the;tension of spring 27 the arm.-22j-being inengage merit-with one of: thesliderods-upon-which the bracket arm l8 ismounted'. When it is desiredto separate the feed' disks, the pedal operatedpullfrod 25' is actuated,thuspushing the bracket arm= 18Jfbrwardly, by; means of the bell crankl"ever;21, in the usual manner. It should here benot'ed, however, thatwhen the feed disks are arbitrarily separated; a above, or by the;material which isfed' therebetween, the positive actuation, of the Outerfeed disk 15 is not interfered with, by reason of the pin and slotconnection betweenthe shafts 37 and 39. I Y

It will be seen that there is thus provided, in a sewing machine'of theoverseaming type, novel mechanism for positively actuating the outerfeed disk in unison with the inner feed disk, notwithstanding thenecessary separation of the same for the passage of the materialtherebetween, and that said mechanism will continue to functionnotwithstanding variations in thickness of the material which passesbetween the feed disks.

It will also be noted that, by the provision I of the mechanism hereindescribed, objectionable movement of one portion of the material withrespect to the other will be eliminated, by reason of the positiveactuation of the feed disks in unison with each o-her.

I claim:

In a sewing machine, a framework, an inner feed disk, a vertical shaftupon which said feed disk is mounted, said vertical shaft beingjournaled in said framework, a horizontal shaft also journaled in saidframework, and gearing for transmitting the motion of said horizontalshaft to the aforesaid vertical shaft, a bracket arm slidably mountedwith respect to the framework, an outer feed disk rotatably carried bysaid bracket arm, means for normally retracting said bracket arm tocause the outer feed disk carried thereby to press toward the inner feeddisk thereby to grip the material between said feed disks during thesewing operation;

and means forcausing the outer feed disk to be positively actuated inunison with the inner feed disk, said means comprising gearing includinga gear wheel securedto the outer feed disk and a pinion, a verticalshaft upon the lower end of which said pinion is mount ed, said verticalshaft beinglocated forward-- ly and, to one side of the axis of theouter feed disk, a horizontal telescopic shaft, said shaft extendingadjacent the slidable bracket arm which carries the outer feed disk,gearing connecting said telescopic shaft'and the vertical shaft whichcarries the pinion for actuating the outer feed disk, and means forrotating said telescopic shaft comprising gearing and shafting drivenby'the horizontal shaft which actuates the inner feed disk.

In testimony whereof, I have hereunto signed my name.

HARRY WEISNER.

